Marc B. Ray's SCREAM BLOODY MURDER (1973)
The horrifying story of a reasonably deranged young cripple (one hand missing) with sexual issues and a nasty habit of killing pretty much everyone who crosses his path (including an old woman and a dog). On one occasion though, he manages to kidnap a young woman reminding him of his mother (played by the same actress), previously killed by his own hands (well, the one he's got left I mean)...
Run time 85 minutes 55 secondsAudio/Visual sound
A typical early 1970s showstring budgeted gory celluloid piece of trash.
There, you are warned! Don't forget the pack of beer....
Note the presence of Angus Scrimm in a bit role late in the film, best known as the sinister "Tall Man" in Don Coscarelli's "Phantasm" franchise.
more info on http://www.imdb.com/title/tt0070654/